ADVANCED
SP8027
Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier
Copyright 2004 Sipex Corporation
SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500.
SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR
COPY
page
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1
2
3
4
8
7
6
5
VCC
GAIN
VBG
GND
SP8027
8-Pin
OPLGA
VOUT+
VOUT-
VG2
VG1
FEATURES
Dual wavelength 650 and 780nm
150 MHz Bandwidth over all gains
400 V/s Slew Rate
5 ns Setting Time
10 mV Differential Output Offset Voltage
Potentiometer, Voltage or DAC programmable gain
6 dB External Gain Adjust
Small 8-pin OPLGA package
APPLICATION
CD-R, and CD-RW
DVD+/-R, DVD+/-RW, and DVD-RAM
GENERAL DESCRIPTION
The SP8027 represents the next generation in Automatic Power Control (APC) amplifiers designed
specifically for demanding pick-up head applications. Whereas typical APC products exhibit
degradation of bandwidth and slower settling times at higher gain levels, the SP8027 features
constant bandwidth (150MHz) and fast settling times (5ns) across the entire gain adjust range.
With its integrated photo detector, the SP8027 monitors light intensity of the laser diode in CD-R,
CD-RW, DVD+/-R, DVD+/-RW, and DVD-RAM assemblies and converts this light to an output
voltage. The magnitude of this voltage signal corresponds to the laser power intensity and is
subsequently fed back to the laser diode driver to control the laser output power.
The SP8027 on-chip photo detector transforms incident laser light into a proportional current, which
is then converted to a voltage through a trans-impedance amplifier. The SP8027 achieves an
unparalleled level of performance by combining excellent DC stability and low noise with
outstanding AC performance.
The SP8027 is offered with a nominal sensitivity 3600 V/W and is packaged in a 3.0 x 3.5 mm, 8-
lead OPLGA package.
High Speed, Constant Bandwidth
Differential APC Amplifier
ADVANCED
SP8027
Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier
Copyright 2004 Sipex Corporation
SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500.
SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR
COPY
page
2
of
3
PIN ASSIGNMENTS
Pin #
Pin Name
Pin Function
1
Vcc
Supply Voltage. Bypass to GND with ceramic capacitor 0.1F
2
Gain
Gain Switch Input. Low level or Open selects pin VG1, high level selects pin VG2
3
VBG
Common connection bias voltage output for Potentiometer1 and Potentiometer2
4 GND Supply
Ground
5
VG1
Gain Adjust Potentiometer1 wiper connection or control voltage input
6
VG2
Gain Adjust Potentiometer2 wiper connection or control voltage input
7
Vout()
Output Voltage Negative Swing
8
Vout(+)
Output Voltage Positive Swing
OPLGA 8-pin PACKAGE DIMENSIONS
ADVANCED
SP8027
Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier
Copyright 2004 Sipex Corporation
SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500.
SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR
COPY
page
3
of
3
PHOTO DETECTOR PATTERN
ORDERING INFORMATION
Part number
Temperature range
Package Type
SP8027CG
0 + 70
0
C 8-pin
OPLGA
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